# Building permits at 1921 Walnut St, Boulder, CO

Two permits on record here. The newest, Sep 2, 2025: This is a small tenant improvement that includes approx 7 sprinklers to accommodate new interior walls and. Boulder publishes permits without map coordinates, so this address has no map and no quarter-mile list.

## At this address

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Sep 2, 2025 | Fire systems | This is a small tenant improvement that includes approx 7 sprinklers to accommodate new interior walls and ceiling layout (FSR13) | $2,788 | [FIR2025-00320](https://nearbypermits.com/boulder/permit/FIR2025-00320/) |
| Feb 5, 2008 | Roofing | Roofing permit for overlay of 29 squares at 4:12 pitch. | $3,850 | [PMT2008-00449-RFG](https://nearbypermits.com/boulder/permit/PMT2008-00449-RFG/) |

## More on this street

Other addresses on Walnut St with permits, nearest house number first:

- [1940 Walnut St 200](https://nearbypermits.com/boulder/address/1940-walnut-st-200/): newest permit Jan 27, 2025
- [1860 Walnut St 3](https://nearbypermits.com/boulder/address/1860-walnut-st-3/): newest permit Nov 6, 2024
- [2003 Walnut St](https://nearbypermits.com/boulder/address/2003-walnut-st/): newest permit Jul 2, 2026
- [2013 Walnut St](https://nearbypermits.com/boulder/address/2013-walnut-st/): newest permit Nov 5, 2024
- [1819 Walnut St](https://nearbypermits.com/boulder/address/1819-walnut-st/): newest permit Dec 10, 2025
- [1818 Walnut St](https://nearbypermits.com/boulder/address/1818-walnut-st/): newest permit Sep 16, 2026
- [1802 Walnut St](https://nearbypermits.com/boulder/address/1802-walnut-st/): newest permit Oct 24, 2024
- [2046 Walnut St](https://nearbypermits.com/boulder/address/2046-walnut-st/): newest permit Nov 12, 2024
- [1743 Walnut St](https://nearbypermits.com/boulder/address/1743-walnut-st/): newest permit Apr 15, 2025
- [2105 Walnut St 2a](https://nearbypermits.com/boulder/address/2105-walnut-st-2a/): newest permit Sep 9, 2026

---
Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 06:35 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Both permits at this address: https://nearbypermits.com/boulder/address/1921-walnut-st/